Abstract: The petroleum exploration has been taken for over 25 years in the East China Sea.About 2.4 billion of RMB have been invested, 170 000km of seishac lines have been taken, and 47 wells have been drilled in the area. So far, 8 oil and gas fields, 6 oil and gas hedring structures, and over 200 000 000 tons of oil equivalent in place have been found in this area. 3 times of major breaking have been happened in the conhnental cr-ust of the East China Sea and a lot of olefiant materials have been deposited in the Cenozoic basin of the area. The area where the rirst breaking took place can be the exploration target for Paleocene oil and gas. The area where the second breaking took place can be the exploration target for the Deene, Oligocene, eary Miocene and middle Miocene.The arca where the third breaking took place can be the exploration target for middle and late Miocene. The area where the second breaking took place should become main target of exploration and more large and middle oil and gas fields may be found in this area.